<?php  //$Id: edit_form.php,v 1.5.2.3 2008/10/22 09:09:32 nicolasconnault Exp $

///////////////////////////////////////////////////////////////////////////
//																	   //
// NOTICE OF COPYRIGHT												   //
//																	   //
// Moodle - Modular Object-Oriented Dynamic Learning Environment		 //
//		  http://moodle.com											//
//																	   //
// Copyright (C) 1999 onwards  Martin Dougiamas  http://moodle.com	   //
//																	   //
// This program is free software; you can redistribute it and/or modify  //
// it under the terms of the GNU General Public License as published by  //
// the Free Software Foundation; either version 2 of the License, or	 //
// (at your option) any later version.								   //
//																	   //
// This program is distributed in the hope that it will be useful,	   //
// but WITHOUT ANY WARRANTY; without even the implied warranty of		//
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the		 //
// GNU General Public License for more details:						  //
//																	   //
//		  http://www.gnu.org/copyleft/gpl.html						 //
//																	   //
///////////////////////////////////////////////////////////////////////////

require_once $CFG->libdir.'/formslib.php';

class edit_outcome_form extends moodleform {
	function definition() {
		global $CFG, $COURSE;
		$mform =& $this->_form;

		// visible elements
		$mform->addElement('header', 'general', get_string('outcomes', 'grades'));

		$mform->addElement('text', 'fullname', get_string('fullname'), 'size="40"');
		$mform->addRule('fullname', get_string('required'), 'required');
		$mform->setType('fullname', PARAM_TEXT);

		$mform->addElement('text', 'shortname', get_string('shortname'), 'size="20"');
		$mform->addRule('shortname', get_string('required'), 'required');
		$mform->setType('shortname', PARAM_NOTAGS);

		$mform->addElement('advcheckbox', 'standard', get_string('outcomestandard', 'grades'));
		$mform->setHelpButton('standard', array('outcomestandard', get_string('outcomestandard'), 'grade'));

		$options = array();

		$mform->addElement('selectwithlink', 'scaleid', get_string('scale'), $options, null,
			array('link' => $CFG->wwwroot.'/grade/edit/scale/edit.php?courseid='.$COURSE->id, 'label' => get_string('scalescustomcreate')));
		$mform->setHelpButton('scaleid', array('scaleid', get_string('scale'), 'grade'));
		$mform->addRule('scaleid', get_string('required'), 'required');

		$mform->addElement('htmleditor', 'description', get_string('description'), array('cols'=>80, 'rows'=>20));


		// hidden params
		$mform->addElement('hidden', 'id', 0);
		$mform->setType('id', PARAM_INT);

		$mform->addElement('hidden', 'courseid', 0);
		$mform->setType('courseid', PARAM_INT);

/// add return tracking info
		$gpr = $this->_customdata['gpr'];
		$gpr->add_mform_elements($mform);

//-------------------------------------------------------------------------------
		// buttons
		$this->add_action_buttons();
	}


/// tweak the form - depending on existing data
	function definition_after_data() {
		global $CFG;

		$mform =& $this->_form;

		// first load proper scales
		if ($courseid = $mform->getElementValue('courseid')) {
			$options = array();
			if ($scales = grade_scale::fetch_all_local($courseid)) {
				$options[-1] = '--'.get_string('scalescustom');
				foreach($scales as $scale) {
					$options[$scale->id] = $scale->get_name();
				}
			}
			if ($scales = grade_scale::fetch_all_global()) {
				$options[-2] = '--'.get_string('scalesstandard');
				foreach($scales as $scale) {
					$options[$scale->id] = $scale->get_name();
				}
			}
			$scale_el =& $mform->getElement('scaleid');
			$scale_el->load($options);

		} else {
			$options = array();
			if ($scales = grade_scale::fetch_all_global()) {
				foreach($scales as $scale) {
					$options[$scale->id] = $scale->get_name();
				}
			}
			$scale_el =& $mform->getElement('scaleid');
			$scale_el->load($options);
		}

		if ($id = $mform->getElementValue('id')) {
			$outcome = grade_outcome::fetch(array('id'=>$id));
			$itemcount   = $outcome->get_item_uses_count();
			$coursecount = $outcome->get_course_uses_count();

			if ($itemcount) {
				$mform->hardFreeze('scaleid');
			}

			if (empty($courseid)) {
				$mform->hardFreeze('standard');

			} else if (empty($outcome->courseid) and !has_capability('moodle/grade:manage', get_context_instance(CONTEXT_SYSTEM))) {
				$mform->hardFreeze('standard');

			} else if ($coursecount and empty($outcome->courseid)) {
				$mform->hardFreeze('standard');
			}


		} else {
			if (empty($courseid) or !has_capability('moodle/grade:manage', get_context_instance(CONTEXT_SYSTEM))) {
				$mform->hardFreeze('standard');
			}
		}
	}

/// perform extra validation before submission
	function validation($data, $files) {
		$errors = parent::validation($data, $files);

		if ($data['scaleid'] < 1) {
			$errors['scaleid'] = get_string('required');
		}

		if (!empty($data['standard']) and $scale = grade_scale::fetch(array('id'=>$data['scaleid']))) {
			if (!empty($scale->courseid)) {
				//TODO: localize
				$errors['scaleid'] = 'Can not use custom scale in global outcome!';
			}
		}

		return $errors;
	}


}

?>
